title: Prevalence and risk factors of substance use among urban adolescents: questionnaire study.
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D000328:Adult; D017523:Croatia / Q000453:epidemiology; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D015995:Prevalence; D012307:Risk Factors; D012647:Self-Assessment; D017678:Sex Distribution; D019966:Substance-Related Disorders / Q000145:classification / Q000453:epidemiology* / Q000523:psychology; D011795:Surveys and Questionnaires; D014504:Urban Health / Q000706:statistics & numerical data*